Revolving-barrel sand-blast machine



July 8, 1930. E. A. RICH, JR

REVOLVING BARREL SAND BL AST MACHINE Filed March 24, 1926 '7 Sheets-Sheet l ino e info r finer i e/L.

July 8, 1930. E. A. RICH, JR

REVOLVING BARREL SAND BLAST MACHINE Filed March 24, 1926 7 Sheets-Sheet 2 July 8, 1930. E. A. RICH, JR

REVOLVING BARREL SAND BLAST MACHINE Filed March 24, 1926 7 Sheets-Sheet 3 y 8, 1930. E. A. RICH, JR 1,770,013

REVOLVING BARREL SAND BLAST MACHINE Filed March 24, 1926 '7 Sheets-Sheet 4 July 8, 1930.

E. A. RICH, JR 7 REVOLV ING BARREL SAND BLAST MACHINE Filed March 24, 1926 7 Sheets-Sheet 5 Jzerzr ,ZZ/z'er y 8, 1930- E. A. RICH, JR 1,770,013

REVOLVING BARREL SAND BLAST MACHINE Filed March 24, 1926 '1 Sheets-Sheet a y 1930- E. A. RICH, JR 1,770,013

REVOLVING BARREL SAND BLAST MACHINE Filed March 24, 1926 7 Sheets-Sheet 7 $777667 Mfg/age mm a. mcnfm,

Patented. July.8 1930- UNITED STATES PATENT" OFFICE EQUIPMENT COHIfAiNY,

or enrcneo, rumors, nssrenoa '10 ran mamas! roman! or NEW YORK, 11'. 2., A coaroiwrrox or emomomma-3mm. SAND-BLAST. mom];

.Applieation mm umii 24,1928. Serial Io. 90,905.

My invention relates to revolving barrel sand blast machines.

One of the objects of the inventlon is to provide a simple, practical and eflicient concontinuous sand blasting, without stopping the barrel.

Anotherobject of the invention is to arrange for the ready and quick loading and unloading of the machinewhile 1t 1s in.operation.

Another object of the invention is to permit the capacity of the machine to be varied, so that it will hold a greater or less number of articles to be treated, as may be desired.

In the accompanying drawings Fig. 1 is an end view of a revolving sand blast machine embodying my invention;

Fig. 2 is a vertical section of the same taken on line 2-2 in Fig. 1;

. form a polygonal figure,

' and Figs. 3, lines 3-3, 4-4: and 5-5, respect1vely,1n Fig. 2-

Fig. 6 is a side elevation of the machine;

Fig. 7 is a fragmentary side elevation partly in section.

Referring to the drawings, I show a machine involving a rotary barrel comprising inner and outer shells or casings 1 and 2, respectively. The outer shell or casing 2 is preferably of cylindric form, as shown in Fig. 5. The inner shell br" casing maybe formed by a plurality of partsor Isections 3-3, which may be fiat plates-.arranged -to such for example, as an octagonal casing, as best shown in Figs. 4 and 5. Between the members 3-3gthere are spaces or slots 4-4, and these formicrevices or openings through which sandemay Y escape from the interior of the barrelafter it 4 and 5 are cross sections taken onblast nozzles 5-5 being shown at the opposite ends of the barrel.

In the space or chamber 10 between the inner and outer casings 1 and 2, there are arranged means such as vanesll-ll, for shiftin the sand laterally or axially toward one en of the barrel. Thus sand passing through the slots 4-4 for the time being at the bottom or lower portion of the barrel, will be caught by bottom vanes 11-11 and lifted and shifted laterally or axially as said vanes rise due to the barrel rotation, and will then fall to other vanes and so be shifted to the right hand end of the barrel, referring to Fig. 2.

The right hand end of the barrel is provided with a series of blades 12-12, secured to members 3-3 so that these members 12-12 will form pockets or receptacles 13-13 (Fig. 4),immed1ately above the barrel slots or crevices 44-., and these pockets 13-13 rotate in a casing 15 having a discharge nozzle 16. Thus sand moved or shifted to the right hand end of the barrel will fall into and accumulate in these pockets or recesses 13-13, and as the barrel rotates these pockets 13 will rise one after another and will carry sand upwardly and then as each pocket 13 starts downwardl will discharge sand downwardly and out t rough spout 16. Casing 15 preferably has an upwardly extending chimney or duct 18 through which the dust and the like may pass or be drawn.

As an arrangement for rotating the barrel I provide a gear 22 which may be secured by bolts 23 to a head 24 at the other end of the rotary barrel said gear 22 being understood to be in mesh with a power drlven driving pinion (not shown).

For supporting the barrel and permitting its'rotation I show a pair of rollers 25-25 which may be mounted upon and between supporting beams 26, the barrel being provided with an annular track 27 adapted to travel on'said rollers 25. The yoke 26 is supported by beams or channels 26-26 through olts 27 -27, the beams 26' resting on supports 28-28, whereby the barrel and particularly the right hand end thereof (Fig. 2) maybe adjusted and raised and lowered by adjusting nuts 6.. at. 27-27-. The other end of the barrel is preferably supported by a yoke 29 pivotally 'mounte on beams 26 through bearings 29, said yoke 29 having an annular guideway 30 formed by arms 31 and 32, within which guideway an annular hub or trunnion 33 on the barrel head 24 'fits and turns. means of pivotal mounting 29-29", and vertically adjustable yoke 26, the barrel may be more or less tilted vertically so that its axis willincline more .or less to beams 26, and to the horizontal.

Thus it will be seen that the sand blasting o eration ma be carried on by the discharge 0 the sand b ast nozzles 5-5 into the rotating barrel and upon the articles more or less on the bottom of the same, and that the used sand will fall through the slots 44 and be shifted to the. right hand end of the barrel '(Fi 2) and be carried upwardly and then dis arg'ed downwardly so that it may be conveyed to the sand blast machine and used' chine in order to load and unload it. In this way I may sand blast articles of the same kind indefinitely b a continuous sand blasting operation, feeding said articles, in and taking them out without stoppage,.and may also do what is called batch sand blasting without stopping,--that is sand blast diflerent batches of articles, each batch being different kinds of articles without necessitatmg the stopping of the machine and without havin the different kinds of articles commingle To this end I show a hopper 35- at the left hand or feed end of the machine, referring to Fig. 2, which hopper 35 is adapted to receive artlcles to be treated or sand blasted and to convey them into the interior of the inner casing 1 through tubular hub 36 opening into the interior of the barrel. Furthermore, the other or right hand end of the barrel (Fig.

12) is preferably made entirely open so that castings or articles may readily roll out of it. For temporarily closing the lower part of this right hand or delivery end of the barrel, a swinging gate 38 is shown, andthis is pivoted at 39 (Fig. 3) so that it mayswing up and down to more or less.close the delivery end of the barrel, as shown in Fig. 2. The other or free swinging end of the gate 39 is provided with swinging means, as for example, a link 40 pivotally connected at'41 to another link 42, which is provided with a of articles put in. These may the preceding batch and then t stipare shaft 43 ada ted to takea handle 44 ig. 6) whereby t e swinging end-of said gate 38 may be adjusted'more or. less vertically. Thus for batch blasting, for-example,

the gate 39 may be swung up so as to close the delivery end ofthe barrel sufficiently to hold a. certain number of articles in the barrel and thereby insure their being sand blasted.

When the operation is over the gate 38 may be lowered, thereby completely opening the deliver end of the barrel and permitting said artic es to fall out of the open delivery end of the barrel. They may then be taken away and the gate 38 again elevated and another atQch be treated as e delivery end of the barrel opened and they may be taken out andthe barrel again closed and another batch, put in, and so on. To secure proper delivery the barrel may be tilted more or less axially as previously described, so that the requisite inclination for the delivery of the I articles may be secured.

The barrel is also provided with means by which it may be partially closed to a greater or less degree for continuous sand blasting, as by providing it with a plurality of rings 4646, which are secured in place one within the otherby bolts 4747. These rings will always retain a certain number of articles within the barrel'and so continuous blasting may takeplace by feeding articles in the feed end and allowing them to fall out of the delivery end, some of them always remaining in the barrel and being blasted.

The number of rings 46-46 a plied to the delivery end of the barrel may e varied as desired in order to vary the number of articles which may be retained in the barrel. Four such rings are shown (Fig. 7), but this number can be more or less varied in accordance with the results sought to be obtained.

F of batch blasting, these rings 4646 will ordinarily be omitted and the adjustable gate 38 alone used for controlling the delivery of castings from the barrel, this arrangement being shown in Fig. 2. On the other hand, for continuous blasting the gate 38 will ordinarily not be used, but will be lowered to its lowermost position, as shown in Fig. 7, and only the rings 46 used to partially close the delivery end of the barrel. Under certain circumstances if desired, it is obviogs that both rings 46 and gate 38 may be use i The castin when delivered from the barrel may tum 1e upon' an apron or delivery chute 19 located opposite the delivery end of the barrel and from this chute they may pass through a door 21 to the floor or some rece tacle by which they may be taken away. T e apron 19 is preferably provided with apertures 20 to permit any sand that may escape with the castings to fall back into the casing 15 and into pockets 13.

It will be understood that changes and modifications may be. made without departin from the spirit of the invention.

at I claim is:

1. A sand blast machine having a rotary" sand blast barrel one of whose ends is provided with an article outlet, in combination with means for varying the size of said outlet, said means comprising annular members adapted for attachment to of the barrel to more or less close the opening thereof. y Y

2. A sand blast machine having a rotary sand blast barrel one of whose ends is provided with an article outlet, in combination with means for varying the size of said outw with means for varying the size of said outlet, said means comprising a swinging gate one of.

whose ends is pivotally mounted and the other of whose ends is provided with means for verticallyswinging said gate..

4. A sand blast machine having a rotary sand blast barrel one of whose ends is pro vided with an article outlet, in combination with means for varying the size of said outlet, said means comprising a swinging gate one of whose ends is pivotally mounted and the other of whose ends is provided with means for vertically swinging said gate, said last mentioned means comprising a pivoted arm and a link pivotally connected with said arm and also with said gate.

In witness whereof, I hereunto subscribe my name this 3rd djaiy of October, A; D., 1925.

' LMER A. RICH, JR.

the discharge end 

